﻿/*
* Copyright (c) 2010-2012 Tesla Engine Group
* 
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* 
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* 
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/


using Tesla.Core;

namespace Tesla.Input {
    /// <summary>
    /// InputAction contains the logic that should be performed when an input condition
    /// is true. This is paired with an InputCondition inside an InputTrigger. Actions
    /// and conditions can vary independently of one another, allowing actions to be reused.
    /// </summary>
    public class InputAction {
        /// <summary>
        /// Delegate that contains logic that is excuted
        /// by InputAction.Perform(), used in leiu of a
        /// subclass.
        /// </summary>
        /// <param name="time">Time elapsed since the last update</param>
        public delegate void DelegateInputAction(GameTime time);

        private DelegateInputAction _action;

        /// <summary>
        /// Creates a new instance of <see cref="InputAction"/>.
        /// </summary>
        protected InputAction() {}

        /// <summary>
        /// Creates a new InputAction with the specified delegate function.
        /// </summary>
        /// <param name="action"></param>
        public InputAction(DelegateInputAction action) {
            _action = action;
        }

        /// <summary>
        /// Performs the action.
        /// </summary>
        /// <param name="time">Time elapsed since the last update</param>
        public virtual void Perform(GameTime time) {
            if(_action != null) {
                _action(time);
            }
        }
    }
}
